Reinforcing unit for concrete.



/z@ (W I @Ma MW s. B.` RUSSELL.- BEINFORCING UNI'I'v FOB CONCRETE.APPLICATION FILED FEBJ, 1909,

-951,150. E Patented Mar.s,191o.

l ;*1 I G L CU E J. J'-

E. ,Fr t f3- "RP 'E- .UF/3) 'e1 )PH WITNESSS i SILAS BENT RUSSELL, OFST. EOUIS, MISSOURI.

REINFORCING UNIT FOR CONCRETE.

Specification of Letters Patent.

Application led February 1, 1909. Serial No. 475,449.

f'b all whom it may concern:

Be it known that I, Suns BENT RUSSELL, residing in the city of St. Louisand State of Missouri, have invented a new and useful Improvement inReinforcing Units for Concrete, of which the following is a full, clear,and exact specification, reference being had to the accompanyingdrawings, which form a part thereof.

My invention relates to metal reinforcing used in connection withconcrete for the purpose of stiiiening and strengthening those parts ofstructures subjected to compressive and 'tensile stresses, and itbelongs to that type of reinforcing wherein the metal part of a beam orgirder is made up as a unit in the shop and then put bodily in place onthe structure where it is to be used, thus avoiding any chances of errorin the construction of the beam or girder due to carelessness or lack ofskill on the part of the Workman.

The object of my invention is to provide a means whereby the properreinforcing for concrete beams, girders, columns, and similar parts ofstructures made up in whole or in part of reinforced concrete may bemade in the shop 4and then shipped and erected in place as a completeunit, and at the same .time providing said unit with means whereby theconcreteA 1s mechanically bonded to the rein-- forcin My invention isfully shown in the accompanying drawings where similar letters are usedto designate similar parts.

Figure l is a view looking at the side of a unit; Fig. 2 is a View of asection along the line 1 1 of Fig. l; and Fig. 3 is a View of ahorizontal section along the line 9.--2 of Fig. 2.

Referring to the figuresJ is a web having attached thereto the flange I.At the edge of the web opposite the tia-nge I, there is a head, G, shownas a bulb in Figs. l and'Q. Projecting outwardly from, and preferably atright angles with, the web J are barbs for the purposes of beingembedded in the concrete and providing a mechanical bond between theunit and the concrete .adjacent to it. In Figs. l, 2, and 3 these barbsare shown at C, D, E, and F, where they are made by unching holesthrough the web J and ben ing the pieces punched from the holes` so thatthey will project outwardly from the web as indicated in the figures.The barbs are referably arranged at the top andbottom of) the -web andon both sides thereof, so as to form a bond to hold the concrete inplace on both sides ofthe web. The form of barbs shown in Figs. '1, 2,and 3 are provided with openings, P, adjacent to the barbs through Awhich the concrete passes land tends to strengthen the bonding betweenthe unit and the concrete adbe in vertical planes, thus making it easyto pack the concrete under and around them. the unit shown in Figs. 1,2, and 3, is made of a special rolled form similar to the ordinary bulb'oeam of commerce.

- lVhen it is desired to use one of theser units in a structure for thepurpose of rein forcing a concrete girder or beam, the load to becarried thereby is determined and then a rolled member of the properlength having a web with its accompanying flange and head piece of theproper size and thick- Patented Mar. 8, 1910.l

ness, is chosen and the barb members formed on the web at the shop; thenthe unit thus formed is taken to the place where it is to be used andput in position where the rein- -forced `concrete beam is to be.

A suitable boX or frame, such as is well known to those who doreinforced concrete work, is built around the unit so as to have itsinternal dimensions those required for the reinforced concrete beam orgirder; and then the concrete is poured into this box around thereinforcing unit and thoroughly tamped and v.made to cover and engagewith the barbs and to pass through the openings P adjacent thereto. Thereinforcmg unit is preferably put with the iiauge I at the bottom sothat it will take up most of the tension to which the reinforcedconcrete beam may be subjected and the headG is placed at the top. Thehead G is made smaller than the iiange I, because the compression towhich the reinforced concrete beam may be subjected will be almostWholly taken up lby the concrete, while the tension being on the lowerpart of the beam will be taken up-'by the flange I. Shear andothervertical and diagonal stresses in the beam will be taken up by the webof the unit. The barbs and the holes adjacent to them mechanically bindthe concrete tothe reinforcing unit so that the two act together as one,thus increasing the strength of the reinforced concrete beam. f j,

lt is evident that this unit is adapted to be used not only inreinforced concrete subjected to both tension and compression, but alsoin columns and wherever it is necessary te have a reinforced concretemember that- ;ubjected to either tension or compression c beth.

llfliile the ilange I is shown at the bottom of the web J and the part Gis called a "t iced, it is evident that this is only done the purposeofillnstration in the spe- Aform vshown in the drawings, and to the beamupside down so that the (ge would be at the top and the head at bottom,would make no material difgg terence as to the manner of action of theunit ina reinforcedconcrete structure.

The position, size and shape of the barbs on the web may be varied, andthe size of the weband the shape and size of the flange and head may beadapted to suit the require-V ments of ditlerent conditions.

Whatjlf claim as new and desire to secure by Letters Patent, is:

l, it, reinforcing unit for concrete consisto'a web having flat barbsprojecting outwardly therefrom, said barbs being arranged in two rowsone near the top and one near the bottom of the web and being formed ofmaterial punched out and bent biaelr, from the Web so as to leave anopening adl jacent to each barb and having their flat sides inplanessubstantially at right angles with the length of the unit, thebarbs of each rowv being arrangedk so that they project alternately fromopposite sides of the .Web, and a ila-nge on one, edge ofthe web,

substantially as described. 2. reinforcing; unit for concrete consistlngof a web having iatbarbs projecting outwardly therefrom, said barbsbeing arweb, a flange on one edge of the web, and a head on the webopposite tlie ange, substantially as described,

In testimony whereof I have signed my name to this specification in t-hepresence of two subscribing Witnesses.

1 S. BENT RUSSELL. Witnesses: 'ELLA JUNE,

Trmnnsa SUEME.

